CN1165689C - Guide mechanism - Google Patents

Abstract

When a guide block 20 is located on each of both ends of a guide rail 18, rollers 50 are situated at a position where they are supported by hard supporting members 28a and 28b of a rail member 36, so that the guide block 20 is positioned at a predetermined position precisely. On the other hand, when the guide block 20 is located at a position in the vicinity of a center of the guide rail 8, the rail member 36 is slightly bent by elasticity of an elastic supporting member 32 in spite of lowering of a position precision in the vicinity of the guide rail due to a warp, a distortion, a bend and the like. Thus, an overload applied to the foregoing rail member 36 and the like is relieved.

Description

guide mechanism

technical field

The invention relates to a guide mechanism for guiding the relative movement of one part relative to another part.

Background technique

Hitherto, in devices in which one member moves relative to another, such as a rodless cylinder, a guide mechanism for guiding the movement of one member relative to the other has been widely used. The guide mechanism in the prior art is constructed in such a way that a guide block constituting the guide mechanism is fixed to a moving part that moves by means of a rodless cylinder, and the guide block freely slides along a guide rail in the longitudinal direction.

However, for the above-mentioned existing guide mechanism, even if the structure of the guide block should be able to stop on the predetermined position of the guide rail, the predetermined position of the guide rail is installed on the base or the like with extremely high positioning accuracy, so as to improve the positioning of the guide block. In the case of precision, when the guide block slides on other parts than the above-mentioned predetermined parts, tension and compression will occur between the guide block and the guide rail due to distortion, deformation, bending, etc. on the above-mentioned guide rail. As a result, the guide rail may be worn or the rollers on the guide block may be subjected to excessive loads, which may damage the guiding function. If the moving amount of the guide block increases with the increase of the length of the guide rail, the probability of damage will further increase.

Contents of the invention

A general object of the present invention is to provide a guide mechanism that can smoothly perform a guiding function by absorbing excessive loads applied to guide pads, guide rails, etc. even when the guide rail is twisted, deformed, bent, etc.

A main object of the present invention is to provide a guide mechanism capable of improving the durability of the guide pad, guide rail, etc. by appropriately absorbing excessive loads applied to the guide pad, guide rail, and the like.

According to the present invention, when the guide block slides on the above-mentioned other parts under the condition that the positioning accuracy of the other parts other than the predetermined part of the guide rail is lowered, although the rail part is subjected to tension and tension acting between the guide rail and the guide block. Extrusion such as compression, but because the above-mentioned guide rail parts are moved by the elastic action of the elastic support part, so the guide rail parts prevent a large force from acting on the guide block and the guide rail, thereby fully exerting the guiding function.

Description of drawings

Fig. 1 is a perspective view of a moving device to which a guide mechanism according to a first embodiment of the present invention is applied.

Fig. 2 is a longitudinal sectional view taken along line II-II of Fig. 1 .

Fig. 3 is a partially enlarged longitudinal sectional view of a rigid supporting member and an elastic supporting member constituting the above-mentioned guide mechanism.

Fig. 4 is a partially cutaway enlarged perspective view of a locking member constituting the above-mentioned guide mechanism.

Fig. 5 is a longitudinal sectional view taken along line V-V in Fig. 1 .

Fig. 6 is a perspective view of a cylinder assembly to which a guide mechanism according to a second embodiment of the present invention is applied.

Fig. 7 is a partially enlarged side view of a mounting member constituting the above cylinder assembly.

Fig. 8 is a partial sectional front view of the above cylinder assembly.

Fig. 9 is a partially enlarged sectional view of the above-mentioned cylinder assembly.

Fig. 10 is a partially enlarged perspective view of a guide shoe constituting the above cylinder unit.

Fig. 11 is a perspective view of a holding member constituting the above-mentioned cylinder assembly.

Fig. 12 is a longitudinal sectional view along the cylinder liner axis of the rodless cylinder constituting the cylinder unit.

Fig. 13 is a partially enlarged cross-sectional view of a workpiece load applied in a substantially vertical direction under the condition of changing the installation posture of the above-mentioned cylinder assembly.

Detailed ways

With regard to the guiding mechanism of the present invention, preferred embodiments are exemplified below and described in detail with reference to the accompanying drawings.

1 and 2 show a moving device 12 to which a guide mechanism 10 according to a first embodiment of the present invention is applied. This moving device 12 is equipped with 2 guiding mechanisms 10/10, and these 2 guiding mechanisms 10/10 are basically fixed on the installation surface 16 of base 14 in parallel, and each guiding mechanism 10 has elongated guide rail 18 and is embedded with guide rail 18. A guide block 20 that can slide thereon is combined.

Plate-like workbenches 22 are respectively fixed on a group of guide blocks 20/20 at predetermined intervals. The stopper 23 is fixed on the base 14, and when the guide block 20 touches the stopper 23, the worktable 22 stops moving and is positioned. Each of the two guide mechanisms 10/10 has the same configuration, and the same reference numerals are attached to the same component group and will be described below.

As shown in FIGS. 3 and 4 , on the upper surface of the guide rail 18 , grooves 24 a and 24 b having a trapezoidal cross-sectional shape are formed along the longitudinal direction thereof, and the two grooves overlap in layers. A groove 26 having a substantially T-shaped cross section is formed at the bottom of the groove 24b.

As shown in FIG. 5 , a pair of hard supporting members 28 a and 28 b made of metal such as steel and having a trapezoidal cross-sectional shape are inserted into grooves 24 b at both ends along the axial direction of the guide rail 18 . The first tapered portion 30 gradually becomes thinner toward the center side of the guide rail 18 is formed on the rigid supporting member 28a/28b. An elastic support member 32 formed of a polymer material such as synthetic rubber or an elastic member such as sponge is inserted between the one rigid support member 28a and the other rigid support member 28b in the insertion groove 24b. At both ends of the elastic supporting member 32, second tapered portions 34 are formed, the thickness of which gradually decreases, and are engaged with the first tapered portions 30 of the above-mentioned hard supporting members 28a/28b. The guide rail member 36 that is made of metal materials such as steel as a ladder-shaped cross-section is inserted in the groove 24a. Therefore, the guide rail member 36 is supported by the hard support members 28a/28b at both ends of its axial direction, and is elastically supported at its middle position. The support of the support member 32 . Therefore, although the two ends of the guide rail member 36 are not flexible, the middle of the guide rail member 36 can be properly flexed due to the elastic action of the elastic support member 32 .

As shown in FIGS. 4 and 5 , the locking members 40 are respectively engaged with the grooves 24 a and 24 b at both ends along the axial direction of the guide rail 18 . A recess 42 is formed at the center of the locking member 40, and a hole 44 communicates with the bottom where the recess 42 is formed. The bolt 46 is inserted into the hole 44, and the bolt 46 is screwed into the square nut 48 inserted into the groove 26, so that the locking member 40 is locked in the groove 24a/24b. In this case, the locking member 40 functions to position and prevent the hard support members 28a/28b and the rail member 36 from falling out.

As shown in FIG. 5 , a plurality of rollers 50 that can roll on the rail member 36 are provided on the guide block 20 , so that the guide block 40 can move on the guide rail 18 with as little resistance as possible.

The guide mechanism of the first embodiment is basically constituted as above, and its operation and effect will be described below.

The workpiece W is placed on the table 22 . As shown in solid line in Fig. 5, guide block 20 is in contact with block 23, and when workbench 22 is positioned at one end of guide mechanism 10, the roller 50 on the guide block 20 is positioned at the position supported by guide rail member 36 and hard support member 28a superior. Therefore, the guide block 20 does not move up and down in a direction perpendicular to its moving direction, and the table 22 is correctly positioned at a predetermined position.

When manually or under the drive of the driving source not shown in the figure, when the workbench 22 moved from one end to the other, the roller 50 of the guide block 20 moved on the guide rail part 36, and the guide block 20 moved along the guide rail 18. Therefore, the roller 50 on the guide block 20 is located at a position supported by the guide rail member 36 and the elastic support member 32 as shown by the dotted line in FIG. 5 .

In this case, when the guide rail 18 is twisted, deformed, bent, etc., the positioning accuracy of the central portion of the guide rail 18 will decrease, and tension and compression will occur between the guide block 20 and the guide rail 18 . This tension and compression will cause the rail members 36 to wear out or place excessive loads on the rollers 50 . When the load borne by the above-mentioned rollers 50 is applied to the guide rail member 36, the guide rail member 36 is deflected to a certain extent due to the elastic action of the elastic support member 32 (refer to the dotted line in FIG. 5 ). Therefore, even when the rollers 50 and the rail member 36 are overloaded, since the overload is sufficiently absorbed by the elasticity of the elastic support member 32, the load on the rollers 50 is reduced and the wear of the rail member 36 is reduced.

Even if the movement amount of the guide block 20 increases as the length of the guide block 18 increases, the overload applied to the roller 50 and the rail member 36 is fully absorbed by the elastic support member 32, so the guiding function can be fully exerted.

When the table 22 moves further and reaches the other end of the guide mechanism 10, the roller 50 moves again to the position supported by the rail member 36 and the hard support member 28b. Therefore, the guide block 20 does not move in a direction perpendicular to its moving direction, and the table 22 is correctly positioned at a predetermined position.

When the workbench 22 moves, the roller 50 moves from the position supported by the guide rail member 36 and the hard support member 28a or 28b to the position supported by the elastic support member 32, because the hard support member 28a/28b and the elastic support member 32 mutually Since the first tapered portion 30 is engaged with the second tapered portion 34, the rail member 36 is slightly bent and does not vibrate due to the step.

In the first embodiment, since the hard support members 28a/28b are provided at both ends of the guide rail 18, the positioning accuracy is higher than that of the central part where the elastic support member 32 is provided, but it is not limited to the above configuration. Of course, for example, the hard supporting member 28a ( 28b ) may be arranged at a location requiring high positioning accuracy, and the elastic supporting member 32 may be arranged at other locations than the above-mentioned location.

In the first embodiment, although the rollers 50 are mounted on the guide block 20, a member 20 (not shown) that can slide on the rail member 36 may be mounted on the guide block 20 instead of the rollers 50.

In the first embodiment, a set of guide mechanisms 10/10 is arranged substantially parallel to each other, but it is not limited to such a configuration, and a single guide mechanism 10, or two or more guide mechanisms 10 may be used in parallel.

Next, the guide mechanism of the second embodiment will be described with reference to FIG. 6 . Components that are the same as those in the first embodiment are given the same reference numerals, and their descriptions are omitted here.

In FIG. 6, reference numeral 100 shows a cylinder assembly 100 to which the guide mechanism 108a/108b of the second embodiment of the present invention is applied. The cylinder assembly 100 basically includes plate-shaped mounting members 106 a / 106 b , guide mechanisms 108 a / 108 b and a rodless cylinder 110 . Among them, the mounting parts 106a/106b are fixed on the mounting surface 104 of the base 102 on which the cylinder assembly 100 is installed, the guide mechanism 108a/108b is erected between the mounting parts 106a/106b, and the rodless cylinder 110 is fixed on the above-mentioned mounting parts 106a/106b is perpendicular to it.

Two mutually parallel slots 112 with a T-shaped section are provided on the mounting part 106a/106b along its length direction. As shown in FIG. 7 , the nut member 114 is movably inserted inside the groove 112 .

The guide mechanism 108a/108b has guide rails 116a/116b erected between the mounting parts 106a/106b and perpendicular thereto, and guide blocks 118a/118b engaged with the guide rails 116a/116b and slidable thereon. A plate-like workbench 120 is erected between the guide blocks 118a and 118b. Cutouts 122 are formed on the ends of the guide rails 116a/116b. The mounting members 106a/106b engage the cutouts 122, and the guide rails 116a/116b are mounted in a direction perpendicular to the direction in which the mounting members 106a/106b extend.

As shown in FIG. 7 , on the guide rail 116a/116b, a thin-walled portion 124 is formed along the edge along its length direction, and a plurality of bolts 126 are inserted into the thin-walled portion 124 , and the bolts 126 are screwed to the nut member 114 . Thus, the rails 116a/116b are secured to the mounting members 106a/106b. When the bolts 126 are loosened, the rails 116a/116b can move along the slots of the mounting members 106a/106b. Grooves 128a/128b into which position detection sensors such as magnetic sensors can be mounted (not shown) and grooves 132 into which stoppers 130 can be mounted are formed on the guide rails 116a/116b (see FIGS. 8 and 9 ).

As shown in FIG. 9, a first parallel surface 134 and a first inclined surface 138 are formed on the guide blocks 118a/118b. The parallel surface 134 is parallel to the mounting surface 104 of the base 102 on which the cylinder assembly 100 is mounted, and the first inclined surface 138 is inclined downward and rightward at an angle of about 45 degrees with respect to the first parallel surface 134 . Between the first parallel surface 134 and the first inclined surface 138, a second inclined surface 136 is formed which is inclined to the left by about 45 degrees relative to the first parallel surface 134 and perpendicular to the first inclined surface 138 (at an angle of about 90 degrees). .

The first parallel surface 134, the first inclined surface 138 and the second inclined surface 136 respectively formed on the guide block 118a/118b face the second parallel surface 140, the third inclined surface 144 and the second inclined surface 136 on the guide rail 116a/116b respectively. 4 inclined surface 142.

Recesses 146 are respectively formed on the first parallel surface 134, the first inclined surface 138 and the second inclined surface 136, and as shown in FIG. 10 and FIG. The retaining member 150 of the portion 148. The retaining member 150 is screwed to the guide blocks 118a/118b via bolts 152 . FIG. 9 shows a state where the holding member 150 fits into the concave portions of the first parallel surface 134 and the first inclined surface 138 .

A semicircular recess 114 is formed on the holding member 150 . The roller 156 is inserted into the recess 154 . The roller 156 is rotatably supported by the holding member 150 via a shaft 158 (see FIG. 9 ). In this case, instead of the rollers 156, a sliding member that slides on the rail member 36 may be attached to the concave portion 154 of the holding member 150.

On the other hand, in the 2nd parallel surface 140 of above-mentioned guide rail 116a/116b, the 3rd inclined surface 144, the 4th inclined surface 142, on the surface (in Fig. Surface 140, the 3rd inclined surface 144) form the groove 24a/24b that is the same as the guide mechanism 10 of the first embodiment, the cross-sectional shape along its longitudinal direction is trapezoidal, and 2 grooves overlap in layers. Further, a groove portion 26 having a T-shaped cross section is formed at the bottom of the groove 24b. A pair of hard support members 28a/28b are respectively inserted in the grooves 24b at both ends along the axial direction of each guide rail 116a/116b, and the elastic support member 32 is inserted between the hard support members 28a/28b (refer to FIG. 5 ). The rail member 36 is inserted into the groove 24a, so that the rail member 36 is supported by the hard support members 28a/28b at both ends thereof, and supported by the elastic support member 32 at the center thereof. The rollers 156 can roll on the rail member 36 . In this case, the rail member 36 may be provided on all of the second parallel surface 140 , the third inclined surface 144 , and the fourth inclined surface 142 .

A groove 164 is formed in the guide block 118a/118b along its moving direction, and a magnet 166 for position detection is inserted into the groove 164 (see FIG. 9).

As shown in FIG. 8, grooves 168a/168b are formed between the mounting members 106a/106b and on the side surfaces of the rodless cylinder 110 provided parallel to the guide rails 116a, 116b. The locking members 170a/170b engage the slots 168a/168b and the locking members 170a/170b are screwed onto the mounting members 106a/106b to secure the rodless cylinder 110 to the mounting members 106a/106b. As shown in FIG. 6, the end blocks 172a/172b are respectively fixed to the ends of the rodless cylinder 110, and high-pressure fluid inlets and outlets 174a/174b are respectively formed on the above-mentioned end blocks 172a/172b (refer to FIG. 6, FIG. 8 and FIG. 12 ). The high-pressure fluid inlet and outlet 174a/174b are connected to a fluid supply source not shown in the figure through a solenoid valve.

As shown in FIG. 12 , a piston 180 is slidably inserted inside the rodless cylinder 110 along a cylinder chamber 181 . Pressure receiving surfaces 182 a and 182 b are respectively formed on both ends of the piston 180 , and holes 184 a and 184 b are formed on the pressure receiving surfaces 182 a and 182 b along the axial direction of the piston 180 . A cylindrical member 186a/186b is provided. The cylindrical member 186a/186b is connected to the end block 172a/172b, has a through hole communicating with the high-pressure fluid inlet and outlet 174a/174b, and can be inserted into the hole 184a/184b. Ring-shaped buffer packings 188a/188b are provided on the walls constituting the holes 184a/184b. The band separators 190a/190b are fixed to the piston choke 192 on the upper part of the piston 180, and the band separators 190a/190b function to make the first sealing member 193 and the second sealing member provided on the upper part of the rodless cylinder 110 194 separate roles from each other. The roller 198 is rotatably pivotally supported above the piston choke 192 via a support member 196 .

On the upper part of the rodless cylinder 110, a moving part 200 reciprocating along the axis direction is provided. A concave portion 202 having a curved cross section is provided on the bottom surface of the moving member 200 . Since the support member 196 is fitted to a wall portion (not shown) constituting the concave portion 202 , the moving member 200 moves together with the piston 180 . The supporting member 196 functions as a float mechanism that allows the moving member 200 to move. A scraper 204a/204b is provided at the lower part of the moving part 200 . As shown in FIG. 8 , the moving part 200 is connected to a guide block 118 b through a joint 206 . A float mechanism that allows the movement of the moving member 200 is not necessarily provided on the rodless cylinder 110 .

The cylinder assembly 100 using the guide mechanism 108a/108b of the second embodiment basically has the above structure, and its operation and effect will be described below.

First, as shown in FIGS. 8 and 9, when the cylinder assembly 100 is installed horizontally on the base 102, and the load of the workpiece W acts on the workbench 120 of the cylinder assembly 100 in the direction of arrow A, the holding member 150 is inserted into the guide. The recessed portion 146 of the first parallel surface 134 and the first inclined surface 138 of the block 118a/118b attaches the holding member 150 to the first parallel surface 134 and the first inclined surface 138 by bolts 152 . Therefore, the roller 156 is attached to the first parallel surface 134 and the first inclined surface 138 . The hard support member 28a/28b and the elastic support member 32 are installed on the groove 24b of the second parallel surface 140 and the third inclined surface 144 of the guide rail 116a/116b, and the guide rail member 36 is installed on the groove 24a.

When pressurized fluid such as compressed air is supplied from a pressurized fluid supply source (not shown) to one pressurized fluid port 174a of the assembled cylinder assembly 100 in this way, the pressurized fluid presses the pressure receiving surface through the passage of the cylindrical member 186a. 182a. Therefore, the piston 180 moves in the arrow C direction in FIG. 12 . At this time, since the piston 180 is fitted into the wall portion constituting the concave portion 202 of the moving member 200 , the moving member 200 moves in the arrow C direction.

This movement is transmitted to one guide block 118b via the joint 206, and from the guide block 118b to the table 120 and the other guide block 118a. Therefore, the guide blocks 118a/118b and the table 120 move together in the longitudinal direction of the rodless cylinder 110, and the workpiece W is conveyed.

Similarly, when the pressure fluid is supplied to the other pressure fluid inlet and outlet 174b (refer to FIG. 8 ) provided on the opposite side to the pressure fluid inlet and outlet 174a, the piston 180 moves in the arrow C' direction in FIG. Shipping in the direction of C`.

At this time, the load of the workpiece W acts on the table 120 in the arrow A direction. This load is supported by the roller 156 attached to the first parallel surface 134 of the guide block 118a/118b and the guide rail member 36 provided on the second parallel surface 134 of the guide rail 116a/116b. Due to the unbalanced load of the workpiece W, a force in a direction substantially perpendicular to the direction of the arrow A or inclined to the direction may act on the guide pads 118a/118b. This force is supported by the roller 156 attached to the first inclined surface 138 of the guide block 118a/118b and the rail member 36 provided on the third inclined surface 144 of the guide block 116a/116b.

When the positioning accuracy of the central part of the guide rail 116a/116b decreases due to distortion, deformation, bending, etc. The wear of the guide rail part 36 increases, or an overload acts on the rollers 156 . If a load acting on the rollers 156 is applied to the guide rail member 36, the guide rail member 36 is slightly deflected due to the elasticity of the elastic support member 32. Therefore, the overload acting on the roller 156 and the rail member 36 is sufficiently absorbed by the elastic action of the elastic support member 32, and the wear of the rail member 36 and the load on the roller 156 can be reduced.

Here, adjustment of the width of the table 120 according to the shape and size of the workpiece W will be described.

First remove the workbench 120 from the guide block 118a/118b, and unscrew a guide rail 116a fixed to the bolt 126 on the mounting part 106a/106b, as shown in dotted line in Figure 8, move the guide rail along the mounting part 106a/106b 16a. At this time, the nut 114 moves inside the groove 112 together with the guide rail 116a. After the guide rail 116a is moved to a predetermined position, the bolt 126 is tightened to fix the guide rail 116a to the mounting member 106a/106b. At this time, the workbench 120 having a width corresponding to the distance between the guide blocks 118a and 118b is installed on the guide blocks 118a/118b.

If the cylinder assembly 100 equipped with a workbench 120 of such a width is used, the movement of the workpiece W in the direction perpendicular to the advancing direction of the guide blocks 118a/118b is well supported by the workpiece table 120, and the workpiece W can be transported stably. Furthermore, since there is no need to enlarge the size of the guide rails 116a/116b and the guide blocks 118a/118b, the cost can be reduced, and the degree of freedom in design can be increased because there is no need to change the dimension in the height direction from the mounting surface 104 to the table 120.

As shown in FIG. 13 , the installation posture of the cylinder assembly 100 is changed, and the cylinder assembly 100 is installed on a slightly vertical wall surface 105. When the load acts on the side surfaces of the guide blocks 118a/118b in the direction of the arrow B, the holding member 150 is embedded into the guide block. In the recesses 146 of the first inclined surface 138 and the second inclined surface 136 of the block 118a/118b, the roller 156 is attached to the first inclined surface 138 and the second inclined surface 136 . In addition, the hard support member 28a/28b and the elastic support member 32 are installed in the groove 24b of the third inclined surface 144 and the fourth inclined surface 142 of the guide rail 116a/116b, and the guide rail member 36 is mounted on the groove 24a.

When the load of the workpiece W acts on the guide block 118a/118b in the direction of arrow B, the load is carried by the first inclined surface 138 installed on the guide block 118a/118b, the roller 156 on the second inclined surface 136 and the guide rail 116a. /116b is supported by the guide rail member 36 on the third inclined surface 144 and the fourth inclined surface 142 .

As mentioned above, even if the direction of the load action of the workpiece W is changed, as long as the installation positions of the rollers 156, the hard support members 28a/28b, the elastic supports 32 and the rail members 36 are changed, possible disadvantages can be avoided. On the 1st parallel plane 134 of guide block 118a/118b, the 1st inclined plane 138, roller 156 is adorned on the whole face of the 2nd inclined plane 136, on the 2nd parallel plane 140 of guide rail 116a/116b, the 3rd inclined plane 144, The entire surface of the fourth inclined surface 142 is equipped with the hard support members 28a/28b, the elastic support members 32 and the guide rail members 36, so that the load direction of the workpiece W and the installation posture of the cylinder 100 can support the load of the workpiece W well without restriction. .

For the second embodiment applicable to the cylinder assembly 100, although it is proposed to space the rodless cylinder 110 and arrange a group of guide mechanisms 108a/108b in parallel, it is not limited to this configuration, and a single The guide mechanism 108a (108b) parallel to the rodless cylinder 110, or two or more guide mechanisms 108 are arranged side by side.

The cylinder assembly 100 using a guide mechanism is not limited to the configuration of the rodless cylinder 110, for example, a hydraulic cylinder not shown in the figure, a linear driver such as an electric driver are attached with one or more guide mechanisms.

According to the present invention, when the guide block is positioned at a predetermined position of the guide rail, since the rollers of the guide block are positioned at positions supported by the hard supporting parts of the guide rail, the guide block will not move in a direction substantially perpendicular to its moving direction, and the guide Blocks are correctly positioned in their intended positions. On the other hand, when the guide block is located on other parts than the predetermined position of the guide rail, even if the positioning accuracy of the guide rail is reduced due to twisting, deformation, bending, etc., the guide rail components will move in the direction of the guide block due to the elasticity of the elastic support member. Moving in the vertical direction, the wear of the guide rail parts and the load acting on the rollers are reduced, and the guiding function can be performed smoothly.

Because the joints of the hard support part and the elastic support part are meshed with each other due to the action of the first tapered part and the second tapered part, the roller is between the position supported by the hard support part and the position supported by the elastic support part of the guide rail part. When the guide rail member is rotated in between, the guide rail member moves slowly along the second tapered portion of the elastic support member, so the vibration caused by the step can be suppressed.

Claims (14)

1. A guiding mechanism, characterized in that: comprising: Elongated guide rail (18, 116a/116b); A guide block (20, 118a/118b) freely movable along the axial direction of the guide rail (18, 116a/116b); A guide rail component (36) provided on a sliding surface along the axial direction of the guide rail (18, 116a/116b) on which the guide block (20, 118a/118b) can slide; The hard support member (28a, 28b); An elastic elastic supporting member (32) provided on the above-mentioned groove (24b), opposite to the above-mentioned guide block (20, 118a, 118b) and supported on other positions except the above-mentioned predetermined position of the above-mentioned guide rail member (36) . 2. The guiding mechanism according to claim 1, characterized in that the above-mentioned hard support members (28a, 28b) are respectively installed in the grooves (24b) at both ends of the axial direction of the guide rail (18, 116a/116b), The above-mentioned elastic supporting parts (32) are coaxially installed between the above-mentioned group of hard supporting parts (28a, 28b), and the above-mentioned hard supporting parts (28a, 28b) are opposite to the guide blocks (20, 118a/118b) and support Both ends of the guide rail member (36), and the above-mentioned elastic supporting member (32) and the above-mentioned guide block (20, 118a/118b) relatively support the central part of the above-mentioned guide rail member (36). 3. The guide mechanism according to claim 1, wherein said rigid supporting member has a first tapered portion (30) whose wall thickness gradually becomes thinner toward said elastic supporting member, and said elastic supporting member has a wall thickness A second tapered portion (34) that gradually becomes thinner toward the hard supporting member and fits into the first tapered portion (30). 4. The guiding mechanism according to claim 1, characterized in that a plurality of rollers (50) that can freely roll on the above-mentioned guide rail member (36) are arranged on the above-mentioned guide block (20). 5. The guide mechanism according to claim 1, characterized in that a sliding member that can freely slide on the above-mentioned guide rail member (36) is provided on the above-mentioned guide block (20). 6. The guide mechanism according to claim 1, characterized in that there are an odd number of the above-mentioned guide mechanisms (10). 7. The guiding mechanism according to claim 1, characterized in that a plurality of the above-mentioned guiding mechanisms (10) are arranged in parallel. 8. The guiding mechanism (108a, 108b) according to claim 1, characterized in that: The guide mechanism (108a, 108b) is attached to a linear actuator including a rodless cylinder (110). 9. The guide mechanism according to claim 8, wherein the guide mechanism is composed of a singular number and arranged parallel to the axis of the linear actuator. 10. The guide mechanism according to claim 8, wherein the guide mechanism is composed of a plurality and arranged parallel to the axis of the linear actuator. 11. The guide mechanism according to claim 8, characterized in that a parallel surface (134) substantially parallel to the installation surface is provided on the above-mentioned guide block (118a, 118b), and is inclined at a predetermined angle relative to the above-mentioned parallel surface (134) The first inclined surface (138) and the second inclined surface (136) formed between the above-mentioned parallel surface (134) and the above-mentioned first inclined surface (138), the above-mentioned parallel surface (134), the above-mentioned first inclined surface ( 138) and the above-mentioned second inclined surface (136) form recesses (146) respectively, and a plurality of rollers (156) are selectively arranged on the above-mentioned plurality of recesses (146), and the rollers (156) can be placed on the guide rail ( 116a, 116b) on a plurality of rail members (36) rolling. 12. The guide mechanism according to claim 11, characterized in that the above-mentioned roller (156) is rotatably supported on the holding member (150), and the above-mentioned operating member (150) is detachably installed in the recess (146) . 13. The guiding mechanism according to claim 8, characterized in that on the above-mentioned guiding mechanism, a mounting part for adjusting the distance between the linear driver (110) is provided in a direction substantially perpendicular to the guide rail (116a, 116b) (106a, 106b), on the above-mentioned mounting parts (106a, 106b), a groove portion (112) is formed in the axial direction, and the groove portion (112) is connected with the bolt member (126) mounted on the guide rail (116a, 116b). ) chimerism. 14. The guiding mechanism according to claim 13, characterized in that the above-mentioned mounting parts (106a, 106b) are composed of a group with a certain distance from each other, and are arranged on the guide rails (116a, 116b) and the rodless cylinder (110 ) in the direction perpendicular to the axis.

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